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Alona [7]
1 year ago
15

Now assume that the boat is subject to a drag force fd due to water resistance. is the component of the total momentum of the sy

stem parallel to the direction of motion still conserved?
Physics
2 answers:
gogolik [260]1 year ago
6 0

No

<h2>Further Explanation </h2>

The law of conservation of momentum states that "if there is no external force acting on the system, then the total momentum just before is equal to the total momentum after the collision". when using this equation, we must pay attention to the direction of the speed of each object.

The law of conservation of momentum is one of the basic laws in physics. This law states that "the total momentum of two objects before the collision is the same after a collision". This statement implies that the total momentum value when objects collide is constant or unchanged. To understand this law, we can begin by understanding Newton's Third Law of Action and Reaction.

The force acting on each colliding object occurs over a period of time. Regardless of the length of time the force contact occurs, this time interval is the same for object 1 and object 2. This means that the time interval between the workings of the forces from object 1 to object 2 is the same as the time interval for the workforce of object 2 to object 1.

As a consequence of the forces acting on the two objects are equal/opposite direction and the time interval between the occurrence of the force is also the same, then the impulse that occurs on the two objects is the same value and opposite direction.

From the theory of impulse-momentum change, that the impulse that occurs in an object is the same as its momentum change. Thus, because every object experiences an impulse that is equally large and opposite in direction, then logically each object also experiences changes in momentum that are as large and opposite.

Learn more

 The law of conservation of momentum brainly.com/question/3262217

Details

Grade:  High School

Subject:  Physics

keywords: Momentum, impulse.

DochEvi [55]1 year ago
4 0
Based on the given details with this question, I can say that the direction of motion is not conserved. This is because the boat is subjected to an external force because of water resistance. So, the answer for this question would be NO.
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A bullet is fired horizontally, and at the same instant a second bullet is dropped from the same height. Ignore air resistance.
Brut [27]

Answer:

They hit at the same time

Explanation:

The bullet that is fired horizontally, the horizontal component of the speed is the speed with which is its is fired and the vertical component of the speed comes in picture due to gravity only.

When the bullet is dropped from the same height, the horizontal component is zero but the vertical component arises from the gravity.

The vertical components of the velocity of both the bullets are same and thus, they fall at the same time.

<u>Answer: They hit at the same time</u>

5 0
2 years ago
A "biconvex" lens is one in which both surfaces of the lens bulge outwards. Suppose you had a biconvex lens with radii of curvat
Stolb23 [73]

Answer: f=150cm in water and f=60cm in air.

Explanation: Focal length is a measurement of how strong light is converged or diverged by a system. To find the variable, it can be used the formula:

\frac{1}{f} = (nglass - ni)(\frac{1}{R1} - \frac{1}{R2}).

nglass is the index of refraction of the glass;

ni is the index of refraction of the medium you want, water in this case;

R1 is the curvature through which light enters the lens;

R2 is the curvature of the surface which it exits the lens;

Substituting and calculating for water (nwater = 1.3):

\frac{1}{f} = (1.5 - 1.3)(\frac{1}{10} - \frac{1}{15})

\frac{1}{f} = 0.2(\frac{1}{30})

f = \frac{30}{0.2} = 150

For air (nair = 1):

\frac{1}{f} = (1.5 - 1)(\frac{1}{10} - \frac{1}{15})

f = \frac{30}{0.5} = 60

In water, the focal length of the lens is f = 150cm.

In air, f = 60cm.

5 0
2 years ago
Read 2 more answers
A nerve signal is transmitted through a neuron when an excess of Na+ ions suddenly enters the axon, a long cylindrical part of t
ivolga24 [154]

Answer:

1.32.225 N/C, direction is away from the point charge

2. 8.972*10^-12 C

3. the field is directed away from the axon

Explanation:

The electric field can be calculated as shown below:

E = k*|q|/r^2

Where:

E = electric field; k = 8.98755*10^9 N*m^2/C^2; r = distance between the measured field and point charge = 0.05 m; q = the point charge

For 0.100 m of the axon, the value of q is:

q = (5.6*10^11)*(+e)*(0.001)

+e = charge of an electron = 1.60217*10^-19 C

Thus:

q = (5.6*10^11)*(1.60217*10^-19)*(0.0001) = 8.972*10^-12 C

Therefore:

E = (8.98755*10^9)*(8.972*10^-12)/0.05^2 = 32.255 N/C

A positive point charge always produce an electric field that is directed away from the field while a negative point charge produces an electric field that is directed toward the field

3 0
2 years ago
While playing basketball in PE class, Logan lost his balance after making a lay-up and colliding with the padded wall behind the
olga2289 [7]

Answer:

a.) F = 3515 N

b.) F = 140600 N

Explanation: given that the

Mass M = 74kg

Initial velocity U = 7.6 m/s

Time t = 0.16 s

Force F = change in momentum ÷ time

F = (74×7.6)/0.16

F = 3515 N

b.) If Logan had hit the concrete wall moving at the same speed, his momentum would have been reduced to zero in 0.0080 seconds

Change in momentum = 74×7.6 + 74×7.6

Change in momentum = 562.4 + 562.4 = 1124.8 kgm/s

F = 1124.8/0.0080 = 140600 N

6 0
1 year ago
A Styrofoam slab has thickness h and density ρs. When a swimmer of mass m is resting on it, the slab floats in fresh water with
sattari [20]
 <span>A = area of styrofoam 
M = mass of stryofoam = A*h*rho_s 
m = mass of swimmer 

Total mass = m + M = m + A*h*rho_s 
Downward force = g*(total mass) = g*[m + A*h*rho_s] 

The slab is completely submerged. 
Buoyant force = g*(mass of water displaced) = g*[A*h*rho_w] 

Equate these 
g*[m + A*h*rho_s] = g*[A*h*rho_w] 
m + A*h*rho_s = A*h*rho_w 
A*h*[rho_w - rho_s] = m 
A = m/[h*(rho_w - rho_s)]</span>
8 0
2 years ago
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